hostapd: remove random pool support - the entropy it gathers is questionable and we have better entropy sources on common platforms now

Signed-off-by: Felix Fietkau <nbd@openwrt.org>

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@38852 3c298f89-4303-0410-b956-a3cf2f4a3e73
cmake.mk: fix support for ccache

Signed-off-by: Felix Fietkau <nbd@openwrt.org>

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@38853 3c298f89-4303-0410-b956-a3cf2f4a3e73